Excavator Komatsu PC35MR-2 20T-62-71160 Hydraulic Main Control Valve assy

List of spare parts

Construction and Components

An excavator control valve consists of multiple integrated components:

(A) Valve Body

• Made of high-strength cast iron or steel to withstand high pressure (typically 300-400 bar).

• Contains precision-machined oil passages for smooth hydraulic flow.

(B) Spool Valves (Main Control Elements)

• Sliding spools inside the valve body shift to open or block oil flow.

• Spool movement is controlled by pilot pressure (hydraulic) or solenoid valves (electro-hydraulic).

(C) Pilot Valve (for Hydraulic Control)

• Generates low-pressure hydraulic signals to move the main spool.

• Reduces operator effort by using a smaller control pressure to regulate larger flows.

(D) Pressure Compensation Valve

• Ensures consistent flow regardless of load changes.

• Prevents one function from starving another when multiple movements occur simultaneously.

(E) Relief Valve (Safety Feature)

• Limits maximum system pressure to protect hydraulic components.

• Activates when pressure exceeds a set threshold (e.g., 350 bar).

(F) Check Valves (Anti-Cavitation & Load Holding)

• Prevent backflow and maintain cylinder position when the valve is neutral.

• Some models include over-center valves for better load control.

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FAQ

• Q: What are your terms of packing?
• A: Generally, we pack our goods in neutral wooden cartons. If you have a legally registered patent,
• we can pack the goods in your branded boxes after getting your authorization letters.
• Q: What about the payment options?
• A: PayPal, T/T, and other payments as request.
• Q: What are your terms of delivery?
• A: EXW, FOB, CFR, CIF, etc.
• Q: How about your delivery time?
• A: Generally, it will take 3 to 30 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
• Q: When can I get the price?
• A: We usually quote within 12 hours after we get your inquiry. If urgent to get the price,
• please call us or tell us by email, we will regard your inquiry priority.
• Q: How do you make our business long-term and good relationship?
• A: 1. We keep good quality and competitive price to ensure our customers benefit ;
• 2. We respect every customer as our friend and we sincerely do business and make friends with them,
• no matter where they come from.
• Q: Do you test all your goods before delivery?
• A: Yes, we have a 100% test before delivery.

Our Advantages

GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.

Our main products are Excavator Hydraulic spare parts, Hydraulic pump, Swing motor, Travel motor, Final drive, Swing gearbox, Travel gearbox, Control valve,Monitor,Controller, Hydraulic cylinder and other hydraulic items with genuine and aftermarket quality. Until now, our products enjoy high reputation all over the world and have been exported to more than 150 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with its own brand "Belparts" are widely acclaimed by foreign customers.

In February 2023, Belparts Yunnan Tourism Team Building

In April 2024, Belparts participated in the Brazil Construction Machinery Exhibition and visited local clients in Brazil.

In April 2024, Belparts participated in the French Construction Machinery Exhibition and visited clients in France and Spain

In May 2024, Belparts Travel Thailand